PhoneSuit.com today announced availability of their new and improved High Capacity 2000mAh MiLi Power Pack, iPhone battery accessory. The PhoneSuit MiLi Power Pack, priced at $79 is an upgrade to the current MiLi iPhone battery. The new version offers additional talk time of up to 13.5 hours on first generation iPhones and 6.5 hours on 3G iPhones. Here is more info:

The PhoneSuit MiLi Power Pack comes in 6 different high gloss colors to choose from. The MiLi is dual compatible with both the iPhone first generation (2G) and 3G. The MiLi comfortably slides on to the back of your iPhone to more than double its charging capacity. It also includes a USB out port to charge any USB accessory such as a Bluetooth headset when you're on the move.